<template>
    <div>
        <!-- 面包屑导航 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>角色管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
        <!-- 卡片视图区 -->
		<el-card class="box-card">
            <!-- 添加角色按钮 -->
            <el-row :gutter="10">
                <el-col>
                    <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
			<!-- 角色列表区域 -->
			<el-table :data="rolesList" style="width: 100%" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdBottom', i1 === 0?'bdtop':'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级循环 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0?'':'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag closable @close="removeRightById(scope.row, item3.id)" type="warning" v-for="(item3, i3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
				<el-table-column type="index" label="序号"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
						<!-- 修改按钮 -->
						<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
						<!-- 删除按钮 -->
						<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRolesById(scope.row.id)">删除</el-button>
						<!-- 分配角色按钮 -->
						<el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
                </el-table-column>
			</el-table>
		</el-card>

        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addRoleDialogClose">
            <!-- 内容主体区域 -->
			<el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px">
				<el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
                <!-- <el-form-item label="活动名称">
                    <el-input v-model="form.name"></el-input>
                </el-form-item> -->
            </el-form>
            <div slot="footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoleEvent">确 定</el-button>
            </div>
        </el-dialog>
        <!-- 编辑用户对话框 -->
		<el-dialog title="修改角色" :visible.sync="editRoleDialogVisible" width="50%" @close="editDialogClose">
			<!-- 内容主体区域 -->
			<el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="80px">
				<el-form-item label="角色 ID" prop="roleId"><el-input v-model="editRoleForm.roleId" :disabled="true"></el-input></el-form-item>
				<el-form-item label="角色名称" prop="roleName"><el-input v-model="editRoleForm.roleName"></el-input></el-form-item>
				<el-form-item label="角色描述" prop="roleDesc"><el-input v-model="editRoleForm.roleDesc"></el-input></el-form-item>
			</el-form>
			<!-- 底部区域 -->
			<template #footer>
				<span class="dialog-footer">
					<el-button @click="editRoleDialogVisible = false">取 消</el-button>
					<el-button type="primary" @click="editRoleInfo">确 定</el-button>
				</span>
			</template>
		</el-dialog>
		<!-- 分配权限对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" 
        @close="setRightDialogClose" >
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" 
            show-checkbox node-key="id"
            :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <!-- 底部区域 -->
			<template #footer>
				<span class="dialog-footer">
					<el-button @click="setRightDialogVisible = false">取 消</el-button>
					<el-button type="primary" @click="allotRights">确 定</el-button>
				</span>
			</template>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            // 角色列表
            rolesList:[],
            // 控制添加角色对话框的现隐
			addRoleDialogVisible: false,
            // 控制 分配权限对话框的现隐
            setRightDialogVisible: false,
            // 添加角色的表单数据
            addRoleForm:{
                roleName: '',
                roleDesc: ''
            },
            // 添加角色的表单验证规则
			addRoleFormRules: {
				// 验证角色名称
				roleName: [{ required: true, message: '请输入角色名称！', trigger: 'blur' }, { min: 2, message: '请输入至少两个字符！', trigger: 'blur' }],
				// 角色描述
				roleDesc: [{ required: true, message: '请输入角色描述！', trigger: 'blur' }, { min: 2, message: '请输入至少两个字符！', trigger: 'blur' }],
			},
            // 控制修改用户信息对话框的现隐
			editRoleDialogVisible: false,
            // 查询到的用户信息对象
			editRoleForm: {},
            // 修改角色的表单验证规则
			editRoleFormRules: {
				// 验证角色名称
				roleName: [{ required: true, message: '请输入角色名称！', trigger: 'blur' }, { min: 2, message: '请输入至少两个字符！', trigger: 'blur' }],
				// 角色描述
				roleDesc: [{ required: true, message: '请输入角色描述！', trigger: 'blur' }, { min: 2, message: '请输入至少两个字符！', trigger: 'blur' }],
			},
            // 树形权限列表
            rightsList:[],
            // 树形控件的事情绑定对象
            treeProps:{
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created(){
        this.getRolesList();
    },
    methods:{
        // 获取角色列表
        async getRolesList(){
            const { data:res } = await this.$http.get('roles');
            if(res.meta.status !== 200){
                this.$message.error({
                    showClose: true,
                    message: '获取角色列表失败！'
                })
            }
            this.rolesList = res.data;
        },
        // 关闭对话框重置添加角色表单
		addRoleDialogClose() {
			this.$refs.addRoleFormRef.resetFields();
		},
        // 添加角色事件
        addRoleEvent(){
            this.$refs.addRoleFormRef.validate(async valid =>{
                if(!valid) return;
                // 可以发起添加角色的网络请求
                const { data:res } = await this.$http.post('roles', this.addRoleForm)
                if(res.meta.status !== 201){
                    this.$message.error({
                        showClose: true,
                        message: '添加角色信息失败！'
                    })
                }
                this.$message.success({
                    showClose: true,
                    message: '添加角色信息成功！'
                })
                // 隐藏添加用户对话框
				this.addRoleDialogVisible = false;
				// 添加成功刷新页面 重新获取用户列表
				this.getRolesList();
            })
        },
        // 展示编辑角色的对话框
		async showEditRoleDialog(id) {
			console.log(id);
			const { data: res } = await this.$http.get(`roles/${id}`);
			if (res.meta.status !== 200) {
				this.$message.error({
					showClose: true,
					message: '查询角色信息失败！'
				});
			}
			this.editRoleForm = res.data;
            console.log(res.data);
			this.editRoleDialogVisible = true;
		},
        // 关闭对话框重置修改角色表单
		editDialogClose() {
			this.$refs.editRoleFormRef.resetFields();
		},
        // 修改角色事件
		editRoleInfo() {
			this.$refs.editRoleFormRef.validate(async valid => {
				if (!valid) return;
				// 发起修改用户的网络请求
				const { data: res } = await this.$http.put('roles/' + this.editRoleForm.roleId, {
                    roleName: this.editRoleForm.roleName,
                    roleDesc: this.editRoleForm.roleDesc
                });
				if (res.meta.status !== 200) {
					return this.$message.error({
						showClose: true,
						message: '修改角色信息失败！'
					});
				}
				// 关闭对话框
				this.editRoleDialogVisible = false;
				// 刷新数据列表
				this.getRolesList();
				// 提示修改成功
				this.$message.success({
					showClose: true,
					message: '修改用户信息成功！'
				});
			});
		},
        // 删除角色事件
		async removeRolesById(id) {
			const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
				// 如果用户确认删除，返回值为字符串 confirm
				// 如果用户取消删除，返回值为字符串 cancel
			}).catch(err => err);
			if (confirmResult !== 'confirm') {
				return this.$message.info({
					showClose: true,
					message: '已取消删除！'
				});
			}
			const { data: res } = await this.$http.delete('roles/' + id);
			if (res.meta.status !== 200) {
				this.$message.error({
					showClose: true,
					message: '删除用户失败！'
				});
			}
			this.$message.success({
				showClose: true,
				message: '删除用户成功！'
			});
			this.getRolesList();
		},
        // 通过id移除对应的角色权限
        async removeRightById(role, rightId){
            // 弹框提示用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除该角色权限, 是否继续?', '提示', {
				confirmButtonText: '确定',
          		cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)
            if(confirmResult !== 'confirm'){
				return this.$message.info({
					showClose: true,
					message: '已取消删除！'
				})
			}
            const { data:res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200){
                this.$message.error({
                    showClose: true,
                    message: '删除权限失败！'
                })
            }
            role.children = res.data;
            this.$message.status({
                showClose: true,
                 message: '删除权限成功！'
            })
        },
        // 控制 分配权限对话框的现隐
        async showSetRightDialog(role){
            this.roleId = role.id;
            // 获取所有权限数据
            const { data:res } = await this.$http.get('rights/tree');
            if(res.meta.status !== 200){
                this.$message.error({
                    showClose: true,
                    message: '获取权限数据失败！'
                })
            }
            // 把获取到的权限数据保存到data中
            this.rightsList = res.data;
            
            // 递归获取三级节点的id
            this.getLeafKeys(role, this.defKeys);

            this.setRightDialogVisible = true;
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 中
        getLeafKeys(node, array){
            if(!node.children){
                // 如果当前node节点不包含children属性，则是三级节点
                return array.push(node.id);
            }
            node.children.forEach(item => {
                this.getLeafKeys(item, array)
            });
        },
        // 监听 分配权限对话框的关闭事件
        setRightDialogClose(){
            this.defKeys = [];
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()];
            const idStr = keys.join(',')
            const { data:res } = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
            if(res.meta.status !== 200){
                this.$message.error({
                    showClose: true,
                    message: '分配权限失败！',
                })
            }
            this.$message.success({
                showClose: true,
                message: '分配权限成功！',
            })
            this.getRolesList();
            this.setRightDialogVisible = false;
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdBottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>